<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>加载用骨架屏</title>
  <style>
    :root {
      --loading-grey: #ededed;
    }
    body {
      background-color: #f6f6f6;
      font-family: Helvetica;
      font-size: 15px;
      display: flex;
      /* justify-content: center; */
      justify-content: space-evenly;
      align-items: center;
      min-height: 100vh;
    }
    .card {
      width: 320px;
      background-color: #fff;
      border-radius: 6px;
      overflow: hidden;
      box-shadow: 0px 4px 6px rgba(0,0,0, .12);
    }
    .image {
      height: 200px;
    }
    .image img {
      display: block;
      width: 100%;
      height: inherit;
      object-fit: cover;
    }
    .content {
      padding: 2rem 1.8rem;
    }
    h4 {
      margin: 0 0 1rem;
      font-size: 1.5rem;
      line-height: 1.5rem
    }
    .description {
      font-size: 1rem;
      line-height: 1.4rem;
    }

    .loading .image,
    .loading h4,
    .loading .description {
      background-color: var(--loading-grey);
      background: linear-gradient(
        100deg,
        rgba(255,255,255,0) 40%,
        rgba(255,255,255, .5) 50%,
        rgba(255,255,255,0) 60%
      ) var(--loading-grey);
      background-size: 200% 100%;
      background-position-x: 180%;
      animation: 1s loading ease-in-out infinite;
    }

    @keyframes loading {
      to{
        background-position-x: -20%;
      }
    }
    .loading h4 {
      min-height: 1.6rem;
      border-radius: 4px;
      animation-delay: .05s;
    }
    .loading .description {
      min-height: 4rem;
      border-radius: 4px;
      animation-delay: .06s;
    }
  </style>
</head>
<body>
  <div class="card" id="main">
    <div class="image">
      <img src="./示例图.jpg" alt="实例图" title="示例图">
    </div>
    <div class="content">
      <h4>Keep On Trying</h4>
      <div class="description">
        This is a description, if you want to know more, please pay attention to the following content...
      </div>
    </div>
  </div>

  <div class="card loading">
    <div class="image"></div>
    <div class="content">
      <h4></h4>
      <div class="description"></div>
    </div>
  </div>
  <p>数据载入后选渲染数据 然后移除loading类</p>
</body>
</html>